https://bugs.freedesktop.org/show_bug.cgi?id=105760
--- Comment #66 from Daniel Drake dan@reactivated.net --- (In reply to Thomas Martitz from comment #65)
https://patchwork.kernel.org/patch/10583229/ (modified such that the quirk is applied unconditionally) fixes GPU resume on my laptop as well. I think it's got the same PCIe bridge as the ASUS machines mentioned in that post.
Thanks for testing! That issue is now being tracked at https://bugzilla.kernel.org/show_bug.cgi?id=201069